Learn Farsi: دزد بی‌شرم و بی‌وجدان باید کیف را دزدیده باشد. - The shameless and unconscionable thief must have stolen the bag.

They use the prefix bi-, which means 'without'. By attaching it to the nouns sharm (shame) and vojdân (conscience), they become the adjectives 'shameless' and 'unconscionable' (or ruthless). The opposite prefix is bâ- (with), so a conscientious person would be bâ-vojdân.

How does the ezafe work to link dozd with these two adjectives?

The hidden ezafe connects the noun to the adjectives, so it is pronounced dozd-e bi-sharm. Because the two adjectives are then joined by the word o (and), you do not need a second ezafe between them: dozd-e bi-sharm o bi-vojdân.

Why is the verb dozdideh bâshad used instead of a simple past tense like dozdid?

This structure is the perfect subjunctive. When you use bâyad to make a logical guess about something that already happened ('must have stolen'), Farsi requires combining the past participle dozdideh (stolen) with the subjunctive form of 'to be', which is bâshad.

Does the prefix bi- change the stress of the word in speaking?

No, the stress falls on the root noun, not on the prefix. In bi-sharm, the stress is firmly on sharm. This is different from verb prefixes like mi- or na-, which usually take the stress away from the root.